Variable-focus lens with 1-kHz bandwidth | Zendy

Hiromasa Oku | Zendy; Koichi Hashimoto | Zendy; Masatoshi Ishikawa | Zendy

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Variable-focus lens with 1-kHz bandwidth

Author(s) -

Hiromasa Oku,

Koichi Hashimoto,

Masatoshi Ishikawa

Publication year - 2004

Publication title -

optics express

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/opex.12.002138

Subject(s) - optics , bandwidth (computing) , actuator , lens (geology) , amplifier , focal length , ranging , materials science , stack (abstract data type) , physics , computer science , engineering , telecommunications , electrical engineering , programming language

This paper proposes a variable-focus lens with 1-kHz bandwidth. The lens transforms its shape rapidly using the liquid pressure generated by a piezo stack actuator. This mechanism also includes a built-in motion amplifier with high bandwidth to compensate for the short working range of the piezo stack actuator. Prototypes have been developed to validate the proposed design. A 1-kHz bandwidth of the lenses was confirmed by measuring the frequency responses. Refractive power ranging from -1/167 to 1/129 mm(-1) and a maximum resolution of 12.3 cycles/mm were attained.

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